KR101986045B1 - Switching device for packaging pack having automatic opening / closing function - Google Patents

Abstract

The present invention relates to an opening and closing device for a packaging pack, having an automatic opening and closing function. The opening and closing device for a packaging pack includes an elastic structure and improves usage convenience by rotating a cover plate by automatically tilting the cover plate by an elastic force of the elastic structure during a process of opening the cover plate. When the opening and closing device for a packaging pack can form a structure capable of autonomously performing the elastic force by using the cover plate by improving the structure of the cover plate when the opening and closing device for a packaging pack is applied with the elastic structure. The opening and closing device for a packaging pack can be easily manufactured in comparison with an existing opening and closing device and does not increase manufacturing costs. So, the opening and closing device for a packaging pack can improve popularity of a product. Also, the opening and closing device for a packaging pack additionally includes a structure for generating the elastic force by improving the structure of the cover plate and improving efficiency of generating the elastic force of the cover plate. Also, the opening and closing device for a packaging pack can maximize the life of the product by minimizing degradation of the elastic force of the cover plate due to repeated use, to form the structure for directly performing the elastic force by the cover plate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a packaging device having an automatic opening /

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an opening and closing apparatus for opening and closing a take-out port of a pack pack by being attached to a pack pack containing contents such as a wet tissue, But it is a technology that maximizes the popularity of the product by enabling the entire opening and closing device to be injection molded at the same time and lowering the production cost.

Recently, widely used wet tissue packages are such that the tissues containing water are stacked in a pouch-shaped packaging pack and drawn out to the outside through a through-hole formed on the upper surface of the packaging pack.

At this time, a separate opening / closing device for opening and closing the outlet is installed on the outflow port of the packaging pack surface. The opening / closing device is mounted and fixed in the form of a ring- The frame is connected with the cover plate so that the upper part of the fixing frame is covered or opened and closed by vertically rotating about the connection point.

In recent years, such an opening / closing apparatus has been proposed in which various convenient functions are added. For example, a structure in which an elastic structure is applied to open and close the cover plate by an elastic force is proposed.

The related arts have a structure in which separate elastic structures are assembled and installed separately for the purpose of exerting an elastic force.

Therefore, in this case, due to the implementation of the elastic part, it is inevitably accompanied with various problems such as complicated and difficult to manufacture the entire opening and closing device, and an increase in manufacturing cost.

The present invention has been proposed in order to solve the problems of the prior art,

The cover plate is automatically turned and rotated by the elastic force of the elastic structure in the process of opening the cover plate by providing the elastic structure so as to improve ease of use,

It is an object of the present invention to improve the structure of the cover plate in applying the elastic structure so that the cover plate itself can exhibit the elastic force, .

It is another object of the present invention to provide a structure for further increasing the elasticity generation efficiency of the cover plate in addition to the generation of elasticity through the improvement of the structure of the cover plate.

In addition, in realizing a direct elastic force exertion structure through the cover plate, it is aimed to minimize the elastic force of the cover plate by repeated use, thereby maximizing the service life of the product.

The present invention for solving such a problem,

1. An opening and closing device used for opening and closing the outlet port, the outlet port being attached to a packing pack having an outlet port formed therein,

A fixing plate which is attached to the periphery of the outlet of the packing pack and surrounds the outlet and is open at the top and has one end integrally connected to one end of the fixing frame, A lid part which is vertically rotatable and which is opened or closed by covering or opening the upper part of the fixed lid in a rotating process; and a lid part which is formed on at least one of the fixed lid and the lid part, and when the lid part covers the upper part of the fixed pot, And an open control part for releasably fastening,

The lid part is formed in a shape in which the folding line is transversely transverse to the left and right direction and is inclined and bent so that the front section is directed upward with respect to the folding line. A section inclined toward the upper side of the lid part is pushed around the fold line and further rotates downward so as to be engaged with the fixed frame through the opening control part, The elastic force is exerted on the fold line in the opposite direction, and in this state, the lid part is fastened to the fixed frame through the opening control part.

In addition, the folding line may be formed on the rear side of the lid part in a state where the lid part is covered with the fixing frame, and positioned on the front side of the connecting point with the fixing frame.

In addition, a thickness reinforcing rib may be formed on the fold line of the upper and lower surfaces of the lid unit to increase the thickness of the fold line to prevent a reduction in the elastic force.

The supporting member is protruded downward from the lower surface of the lid portion of the folding line, the lower end of the support member is in contact with the bottom of the fixing frame, and the inclined portion of the lid portion is pushed downward The lower end of the support member may be pushed downward while being in contact with the inner bottom of the fixed frame to be coupled with the fixed frame.

The lid part is integrally connected to the rear end of the fixing frame and is vertically rotatable about the connection point. The lid part is integrally formed with a point on the opposite side to the connection point with the fixed frame, And a cover plate which is vertically rotatable together with the connecting piece and covers and opens or closes the upper portion of the fixed frame in a rotating process, and the folding line may be formed at a boundary point between the connecting piece and the cover plate, The cover plate is inclined upwardly about the fold line and inclined.

And the thickness reinforcing ribs may be locally formed on the forming path of the folding line.

A bottom plate having a lower surface attached to the surface of the packaging pack and having a through hole formed through the top and bottom at the same point vertically and coplanarly with the outflow port and having a rear end integrally connected to the connection piece, The protruding portion is formed to protrude upward from the rim of the surface and surround the upper surface of the bottom plate, and a protruding portion protruding from the front portion of the rear portion of the connecting portion between the connecting piece and the bottom plate, Wherein the lid part is vertically pivotable about a connecting point between the connecting piece and the lid plate and the bottom plate and the lid plate opens and closes the upper part of the lid protrusion, And the fold line is opened and closed in a non-protruding section of the protruding portion, Achieve the non-projecting section inner end and the same line can be formed.

According to the present invention,

A separate part is not added and a folding line is formed on the lid part so that the front side of the folding line of the lid part is inclined upwardly so that the lid part exerts its own elasticity in covering the fixing frame, Because it is possible,

The structure is much simpler than that of the opening / closing device having the automatic opening function by the existing elastic structure, so that it is easy to manufacture, there is no fear of rising the manufacturing cost, and high usability can be obtained.

Since the section of the lid part inclined upward toward the front side of the folding line further rotates downward about the folding line and the elastic force is exerted at the folding line forming point,

As the thickness reinforcing ribs in the fold line portion are formed in whole or in part of the fold line forming path to increase the thickness of the point,

It is possible to minimize the phenomenon that the elastic force is lowered due to the repeated angle change of the fold line portion due to repeated use, thereby maximizing the automatic opening operation life of the lid portion.

Since the support member protrudes downward from the lower surface of the lid part on the rear side of the folding line, the support member serves as a fulcrum of the lever during the further rotation of the inclined part upward in the lid part, So that the elastic force can be smoothly concentrated.

In addition, since the contact point between the support member and the inner bottom surface of the fixed frame is formed at the rear side of the fold line, the distance between the cover and the open control unit, which is the engagement point between the cover and the fixed frame, In the process of automatically rotating upward by the elastic force, the pivot range is made larger due to the principle of the lever, so that the pivot can be completely turned and rotated to 90 degrees or more.

In addition, since the folding line is formed at the boundary between the lid part and the lid plate which substantially covers the upper part of the fixed lid, the folding plate is pressed downward around the fold line, It is possible to exhibit a normal sealing function in a state in which no warpage phenomenon of the gasket is generated.

Particularly, when the lid part covers the upper part of the fixed frame, when the connecting piece and the lid plate of the lid part simultaneously cover the non-protruding section of the protruding part of the fixed frame and the upper part of the outer protruded part,

Since the folding line is formed so as to be in line with the inner end of the non-projecting section of the outer projecting section,

In the process of covering the upper part of the outer protrusion by further turning around the fold line, the connecting piece and the cover plate are not deformed due to the angle change of the fold line due to the angle change, It is possible to prevent the airtightness from being deteriorated due to the change in the shape of the cover plate or the connecting piece.

FIG. 1 is a perspective view showing a state in which the lid part is completely turned up and the fixing frame is completely opened,
Fig. 2 is a perspective view in the other direction of Fig.
Fig. 3 is a plan view of Figs. 1 and 2
Fig. 4 is a side sectional view of Figs. 1 to 3
Fig. 5 is a perspective view showing a state in which the cover portion is rotated 90 degrees. Fig.
Fig. 6 is a side sectional view of Fig. 5
7 is a perspective view showing a state in which the cover plate is not covered by the oblique slope in the state where the connecting piece of the lid part covers the non-
8 is a cross-sectional view of Fig. 7
FIG. 9 is a cross-sectional view of a state in which the cover plate is pushed downward around the folding line as the user forcibly presses the cover plate in the state of FIGS. 7 and 8 and is further rotated to be fastened to the fixing frame and an elastic force is applied in a direction opposite to the folding line Side view of the state
10 is a side sectional view of the state in which the user releases the engagement between the cover plate and the fixing frame by pressing the open control portion in the state of FIG.
11 is a side sectional view in the state of Fig. 10 in which the entire lid is turned up by the elastic force exerted on the folding line,

Hereinafter, various embodiments of the present invention will be described in detail with reference to the drawings.

Although the present invention has been described in the following for the purpose of sealing or opening the periphery of the outlet of the wrapping pack, the present invention is not limited to the wrapping pack for the wet tissue, The present invention can be applied to all types of packaging packs in which the contents can be taken out to the outside through the outlet when the contents to be stored are accommodated.

As shown in Figs. 1 to 11, the opening and closing apparatus 1 for a pack pack having an automatic opening and closing function according to the present invention largely comprises a fixed frame 4 and a lid unit 12.

The fixing frame 4 serves as an intermediary for attaching the opening and closing device 1 according to the present invention to the surface of the packaging pack 2 and at the same time, To form a closed space.

Such a fixing frame 4 may be configured to include a bottom plate 5 and an outer protrusion 6 as shown in the drawings.

The bottom plate 5 is a portion of the fixing frame 4 directly attached to the surface of the package pack 2 to be attached thereto. The bottom plate 5 is in the form of a plate as a whole, and a through hole 8 is formed in the vicinity of the center thereof.

For reference, the through hole 8 may be variously modified, such as a basic hole having a certain area or a slit slit shape.

The lower surface of the bottom plate 5 is attached to the surface of the pack pack 2 so that the outlets 3 of the packs 2 are positioned in the through holes 8, ) Around the periphery.

The first auxiliary sealing part 10 may be formed on the bottom plate 5 as necessary so that the first auxiliary sealing part 10 can be inserted into the fixing plate 4 when the cover part covers an upper part of the fixing frame 4. [ The inside of the through hole 8 is additionally sealed.

The first auxiliary sealing portion 10 has a structure in which the upper surface of the bottom plate member 5 protrudes upwardly in the form of a wall while completely surrounding the through hole 8.

The outer projecting portion 6 constituting the fixing frame 4 together with the bottom plate 5 is an element for forming a space portion in the fixing frame 4 when the lid portion 12 described later is covered, And has a predetermined thickness and height, and is formed so as to protrude upward from the upper surface rim of the bottom plate 5 to surround the first auxiliary sealing portion 10 in all directions.

At this time, the outer protruding portion 6 is not formed all over the entire edge of the bottom plate 5, but is formed not in the left and right constant length portions from the middle point of the rear end of the bottom plate 5, The non-protruding section 7 is formed at a point where the protruding section is not formed.

For the reference, in the embodiment in which the non-protruding section 7 is formed, the left-right length of the non-protruding section 7 is set to be equal to the width of the connecting piece 13 of the lid section 12 to be described later.

With this structure, the fixing frame 4 has a structure in which the upper part is opened as a whole and the bottom is entirely or partially clogged and attached to the surface of the packaging pack.

The structure of the fixed frame 4 is not limited to the above description but is realized in a state in which the outer protruding portion 6 and the nonprojecting portion 7 are not formed so that the lid portion 12, And can be modified and applied in various forms as long as it can open and close the outlet 3 of the package pack 2 together with the lid part 12 in a state of being attached to the surface of the package pack 2, .

The fixed frame 4 may further include an open control unit 11,

The opening control unit 11 is a mechanism that causes the lid unit 12 to be opened unintentionally when the lid unit 12 is detachably coupled to the lid unit 4 when the lid unit 12, .

For example, when the lid part 12 covers the upper part of the fixed frame 4, the front end of the lid part 12 is positioned at a position And the lid part 12 is integrally brought into contact with the lid part 12 so that the lid part 12 is engaged with the lid part 12 or both the lid part and the fixing frame 4 are interlocked with each other.

In another embodiment of the opening control unit 11, when the outer protruding portion 6 is formed as shown in the figure, the intermediate point of the front end of the outer protruding portion 6 is cut at left and right intervals, (11).

In this case, as shown in FIG. 10, when the user presses the opening control unit 11 with his / her finger, it is formed in such a shape as to be able to pivot slightly upward or downward around a connecting point with the bottom plate 5.

At this time, the opening control part 11 is provided with a protrusion or a groove-like engaging structure so that the front end of the lid part 12 is directly hooked to the engaging structure when the lid part 12 covers the upper part of the fixing frame, 12 may also be provided with a latching structure corresponding thereto, so that engagement between the latching structures can be achieved.

In this state, when the opening control unit 11 is slightly rotated by pressing it with a finger, the lid unit 12 is prevented from being opened unintentionally due to the engagement between the lid unit and the lid unit 12 in a state where the lid unit 12 covers the upper part of the fixed- The fastening structure between the fastening bodies 4 is released.

The opening control unit 11 is not limited to a specific form and can be variously modified in accordance with the shape of the fixing frame 4 and a lid unit 12 to be described later.

The lid portion 12 is connected to the fixed frame 4 described above.

The lid part 12 covers or opens the upper part of the fixing frame 4 to substantially open and close the outlet port of the package pack 2 existing in the fixing frame 4. At the same time, (12) itself is automatically turned upwards to open the fixture.

The lid portion 12 may be formed in various forms including a connecting piece 13 and a lid plate 14.

The connecting piece 13 serves as a connecting medium for connecting the entire lid portion 12 to the fixed frame 4 and forms a folding line 16 for exerting an elastic force of the lid plate 14 to be described later.

The connecting piece 13 is in the form of a plate having a longitudinal direction as a whole and is integrally connected to the rear end of the bottom plate 5 at one end thereof and is vertically rotatable around the connecting point.

At this time, if the outer protruding portion 6 is formed in the fixed body 4, the width of the connecting piece 13 is formed to be the same as the width of the protruding portion 7 of the outer protruding portion 6, So that the connecting piece 13 can cover the non-protruding section 7 in the process of covering the upper part.

Of course, the shape of the connecting piece 13 is not limited to a specific shape, and it is also possible to simply connect the cover plate 14 and the fixing frame 4, which will be described later, in a structure in which the protruding portion 6 is not formed in the fixing frame 4, And a folding line 16 to be described later can be formed at a connection point between the folding line 14 and the folding line 16.

The connection pieces 13 may be formed in a single shape or a plurality of connection pieces 13 may be formed at left and right intervals.

The lid plate 14 constituting the lid portion 12 together with the connecting piece 13 is an element that substantially exposes the upper portion of the fixed frame 4 in the lid portion 12 and exerts the opening and closing function of the in-

The cover plate 14 is integrally connected to an end portion of the connecting piece 13 opposite to the end portion connected to the fixed frame 4, And can be vertically rotated together with the connecting piece (13).

In this state, the cover plate 14 rotates downward to cover the upper part of the fixed frame. If the outer frame protrusion 6 is formed on the fixed frame 4 as shown in the figure, the cover plate 14 covers the upper part of the outer protrusion 6, As a result, the closed space 9 is formed in the interior of the fixed frame 4.

In the lower surface of the lower surface of the fixing plate 4 with the cover plate 14 covering the upper surface of the fixing frame 4, The first auxiliary sealing portion 10 is fitted into the second auxiliary sealing portion 15 when the cover plate 14 completely covers the upper portion of the fixing frame 4 The inside of the through hole 8 is further enclosed in the closed space 9 inside the fixed mold 4 according to the load.

For reference, the insertion structure between the first auxiliary sealing portion 10 and the second auxiliary sealing portion 15 can be implemented with a structure opposite to that described above. Further, if necessary, the first auxiliary sealing portion 10 and the second auxiliary sealing portion 15 The second auxiliary sealing portion 15 may be omitted.

When the lid part 12 is rotated downward by the above-described structure, the entire lid part is covered by the entire upper part of the fixed frame. If the outer lug part 6 is formed on the fixed frame 4, And the cover plate 14 covers the entire remaining part of the upper part of the outer projecting part 6. [

At this time, in the present invention, the fold line (16) is formed on the lid part (12).

The folding line 16 allows the lid part 12 to change its angle around a specific point so that the lid part 12 itself exerts an elastic force in the process of covering the upper part of the fixed frame 4, The lid portion 12 is formed so as to be automatically turned upwardly through self-elastic force so as to be opened.

The fold line 16 is formed in various forms,

If the lid part 12 has the structure of the connecting piece 13 and the lid plate 14 as shown in the drawing, the boundary point between the connecting piece 13 and the lid plate 14 is formed to be transversely transverse do.

In this case, the lid portion 12 is inclined so that the lid plate 14 is inclined upwardly about the fold line 16, and the front end portion of the lid plate 14 is formed with the fold line 16 A structure located above the point.

7 and 8, when the cover 12 covers the upper portion of the fixing frame 4 in a state in which the user does not press the cover plate 14 forcibly, the cover plate 14 completely covers the upper portion of the fixing frame 4 It is tilted upwards without covering.

In this state, when the user forcibly presses the cover plate 14, the cover plate 14 further rotates downward around the folding line 16 to completely cover the upper portion of the fixing frame 4, and at the same time, So as to be detachable from the stationary frame 4, so that the covering state is maintained.

When the cover plate 14 is pushed by the user's forcible pressing and rotates downward about the fold line 16, an elastic force is exerted in a direction opposite to the fold line 16, and in this state, 14 are fastened to the fixing frame 4, the cover plate 14 is kept in a state in which the upward force is continuously applied by the elastic force formed in the vicinity of the folding line 16 in a state in which the fixing frame 4 is completely covered do.

Therefore, at this moment, when the fastening between the cover plate 14 and the fixing frame 4 is released through the opening control unit 11, the cover plate 14 is lifted upward by itself due to the elastic force, As a result of the upward rotation, the entire lid portion automatically rotates upward to open the fixing frame 4. [

As described above, according to the present invention, the automatic opening structure of the lid portion by the elastic force is realized by merely improving the structure of the lid portion without further additional components.

For example, the fold line 16 may be formed in a position offset to the rear side of the lid unit 12 so that the elastic force So that the cover plate 14 can be completely turned at an angle of 90 degrees or more.

In addition, the folding line 16 is basically formed at the front side of the connection point between the rear end of the lid part 12 and the fixed frame 4, so that the elasticity action can be smoothly performed.

When the lid part 12 is constituted by the connecting piece 13 and the lid plate 14, the lid plate 14 is forcibly pressed to be formed at the boundary between the connecting piece 13 and the lid plate 14, It is possible to prevent the occurrence of a warping phenomenon of the connecting piece 13 or the cover plate 14 in the course of turning.

When the outer frame protrusion 6 is formed in the fixing frame 4, the connecting piece 13 covers the non-protruding section 7 of the outer protrusion 6. At this time, the connecting piece 13 and the cover plate 14 Since the folding line is formed at the boundary between the connecting piece 13 and the cover plate 14 in this state, the forming point of the folding line The connection piece 13 is deformed and the non-protruding section 7 can not be completely covered when the elastic force is exerted on the fold line 16 in this state. Or the possibility that the covering plate 14 is deformed and the upper part of the fixing frame can not be completely covered can be minimized.

In addition, a thickness reinforcing rib 17 may be further formed on the fold line 16 of the lid portion 12 as shown in the figure.

The thickness reinforcing rib 17 is an element for minimizing a reduction in the elastic force caused by repeatedly changing the angle of the fold line 16 by the additional rotation of the cover plate 14. [

The thickness reinforcing ribs 17 are formed on the upper surface of the lid part 12 on the path of forming the fold lines 16 so that the thickness of the thick reinforcing ribs 17 is thicker than the other points.

Therefore, as the thickness is reinforced by the thickness reinforcing ribs 17 on the folding line 16, the possibility of occurrence of a reduction in the elastic force of the folding line 16 in the repeated additional rotation of the cover plate 14 can be minimized have.

For reference, the thickness reinforcing ribs 17 may be separately manufactured and attached to the corresponding points, but may be integrally formed with the lid during the injection molding process of the lid 12. [

The thickness reinforcing ribs 17 may be formed on the positive path of the fold line 12 in the lower surface other than the upper surface of the lid portion 12 or may be formed on both the upper surface and the lower surface of the lid portion 12 have.

Further, the thickness reinforcing ribs 17 may be formed over the entire formation route of the folding line 16, or may be formed in a shape such that only one is locally formed, or a plurality of the reinforcing ribs 17 are arranged at intervals.

In this state, the lid part 12 and the fixed frame 4 may further be provided with a supporting member 18.

The support member 18 serves as a fulcrum point necessary for further rotation of the lid plate 14 in the process of forcibly pressing down the lid plate 14 by the user and further rotating the lid plate 14 downward, And when the cover plate 14 is rotated upward by the elastic force, it serves as a fulcrum of the lever principle, thereby guiding the elastic force to be smoothly applied to the cover plate do.

The support member 18 is formed in a shape protruding downward from the rear side of the folding line 16 in the lower surface of the lid portion 12 in a state in which the lid portion 12 covers the fixing frame 4, do.

Therefore, the support member 18 has a structure that is vertically rotated together with the entire cover plate 14.

If the lid member 12 is composed of the connecting piece 13 and the lid plate 14, the lid plate 14 is forcibly pressed by the user so that the supporting member 18 is rotated just before the lid member 14 is further pivoted downward. The connecting piece 13 is blocked from being pivoted downward by the supporting member 18 in the course of the further rotation of the lid unit 12 when the lid unit 12 is pushed in this state, The lid portion 12 can be further pivoted downward about the fold line 16 with the support member 18 as a fulcrum.

As the support member 18 is formed, it is possible to prevent the connection piece 13 from unnecessarily rotating further downward together with the cover plate 14 in the process of forcibly pushing down the cover plate 14 and further rotating downward, The resilient force by the further rotation of the plate 14 can be concentrated on the fold line 16. [

At this time, when the support member 18 is located on the rear side of the fold line 12 of the lower surface of the lid unit 12, when the cover plate 14 is further rotated downward by the user, As shown in FIG.

Of course, even if the supporting member 18 is located on the front side of the fold line 16, sufficient elasticity is not adversely affected.

For reference, the support member 18 may be formed not to protrude from the bottom surface of the lid portion 12 but to protrude upward from the inner bottom surface of the fixture.

Also, since the support member 18 can be realized as a simple protrusion, it can be manufactured separately and attached to the lid part, but it can be molded at the same time during the injection molding process of the lid part.

The protruding length of the second auxiliary sealing portion 15 of the lid portion 12 is formed to be long so that the lid portion 12 is rotated in the downward direction, The rear end portion of the sealing portion 15 is in contact with the bottom of the fixing frame and serves as a supporting member. In this case, the second auxiliary sealing guide portion also functions as a supporting member.

The support member 18 is not necessarily provided, but may be omitted depending on the shape of the lid.

1; opening / closing device 2; packing pack
3; outlet 4;
5, a bottom plate 6,
7; non-protruding section 8;
9: Enclosed space 10: First auxiliary closure
11, an opening control unit 12,
13: connecting piece 14: cover plate
15, a second auxiliary sealing portion 16, a folding line
17: thickness reinforcing rib 18;

Claims (5)

1. An opening and closing device used for opening and closing the outlet port, the outlet port being attached to a packing pack having an outlet port formed therein,
A fixing frame attached to the periphery of the outflow port of the surface of the packaging pack to surround the outflow port,
The lid part being integrally connected to one end of the fixed frame and being vertically rotatable about the connection point and covering or opening the upper part of the fixed frame in a rotating process,
And an opening control part formed on at least one of the fixed frame and the lid part and fixing the lid part and the fixed frame so that they can be separated from each other when the lid part covers the upper part of the fixed frame,
The lid part is formed in a shape in which the folding line is transversely transverse to the left and right direction and is inclined by being bent so that the front section is upward with respect to the folding line,
The lid part is pivoted downward to cover the upper part of the lid part, the section inclined toward the upper side of the lid part is pushed around the fold line and further rotates downward to be fastened to the fixed frame through the opening control part,
The folded portion of the cover portion is pushed downward about the fold line, and the folded portion of the folded portion is pushed downward. In this process, an elastic force is exerted on the fold line in the opposite direction. Characterized in that
An opening and closing device for a pack having an automatic opening and closing function.
The method according to claim 1,
Wherein the folding line is formed such that the lid part is located on the rear side of the lid part with respect to the connection point with the fixed frame in a state in which the lid part is covered with the fixed frame.
3. The method of claim 2,
Wherein a thickness reinforcing rib is formed on the fold line of the upper and lower surfaces of the lid to prevent the elastic force from being lowered by increasing the thickness of the fold line.
3. The method of claim 2,
A supporting member is protruded from a rear side of the fold line on at least one of a lower surface of the lid unit and an inner bottom surface of the fixing frame and the lid unit is in contact with the other of the upper and lower surfaces of the fixing frame,
And an upper portion of the cover portion is pushed downward to be further pivoted about the folding line so as to cover the upper portion of the fixing frame and to be fastened to the fixing frame.
An opening and closing device for a pack having an automatic opening and closing function.
5. The method according to any one of claims 1 to 4,
The lid portion
A connecting piece having one end integrally connected to the rear end of the fixed frame and vertically pivotable about the connecting point,
And a lid plate which is integrally connected with a point of one side of the connection piece opposite to the connection point with the fixed frame and which is vertically rotatable together with the connection piece and which covers or opens the upper part of the fixed frame in a rotating process, and.
Wherein the folding line is formed at a boundary point between the connecting piece and the cover plate, and the cover plate is inclined upwardly toward the center of the folding line.
An opening and closing device for a pack having an automatic opening and closing function.

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